DE3329539C2 - Device for changing a tool holder on a machining unit for machining workpieces - Google Patents

Abstract

A method and arrangement for exchanging a variable number of tool holders in which only one tool holder at a time is brought into working position. The operations involved with accessing a variety of holders, one at a time, to a working position requires movement of minimum mass to the working position adjacent the drive unit-while one or more remaining tool holders are located in a series of accessible independent storage positions or in at least one storage magazine.

Description

3 4

It is known that tool carriers are polygonal when the turret rotates. The precision,

Receiving body as a whole interchangeable unit with which the revolver body is stored, must very much

to design. This polygon-shaped recording should be large. That means that everyone else, not in

bodies have tool carriers with the working position located on their lateral boundary surfaces

numerous tool carriers for receiving work 5 have to be arranged with the same accuracy as

soak up. The receiving body is around a centric tool carrier in the working position.

Axis can be rotated cyclically, around. Here too, the number of tool carriers is determined by the

". To bring the tool carrier into the machining position. Revolver body restricted the bell-shaped

$ The disadvantage is that a different turret body must be used as a unit with the tool carrier

$ £ per with other tool carriers in working position to io gem, whereby the not in working

Ij do not bring the entire large, heavy and bulky tool carrier in operation

m takeover body can be serviced with Werkzeugträgem of the machining because they also pivoted advertising

ψ. machine dismantled, transponderance and in a dea A big problem is also the rigidity of the

0j collective storage must be stored, whereupon an additional construction, because of the storage of the heavy re-

|| the receiving body with tool carriers for the 15 volverbodies.

If the processing machine is transported and assembled From DE-OS 15 02 010 it is known to have to go to the H plant. So it must always provide the entire mass of the tool change of multi-spindle heads also a ringför receiving body with all tool trays shaped tool changing device,
The invention is based on the object of having a front receiving body aligned with tool carriers in accordance with the generic term of the patent claim. The set-up times (dead times) are to be designed in such a way that, in the case of short ancillary times, this system is relatively long. th can achieve a simple mechanical structure, In addition, the number of tool carriers present on one and the same and only the required tool carrier with be-receiving body, z. B. NEN machining tools with the necessary drill heads, structurally limited 25 accuracy fixed, clamped and to the working unit Due to the construction, the receiving body must be coupled with a compact design with high accuracy on the processing machine read the device.

gert, so that even those tool carriers that are This object is not in the processing position in claim 1, achieved with great reproduced features
The device according to the invention adapts depending on the disadvantageous machining task, workpiece spectrum and annual production. It can be expanded and rebuilt, which means that known devices are very tall and wide because of the machine itself, as well as for your control and I a vertical column on two claw-like, separated chaining applies pivotable grippers can accordingly be arranged as a single machine or within the two tool carriers, which are based on a linked system or as an assembly, e.g. B. be placed inside a floor-mounted stage within a transfer line, integrate,
which takes up additional space, especially since the space provided for the device 40 center, in contrast to a so-called machining under the stage, cannot be used in the basic concept of an invention various tools are kept ready in the drive unit. In addition, there are proportionally provided. Rather, complete Werkzeugträßig long non-productive times, which seems uneconomical ger exchanged, the interpretation of the processing by DE-OS 21 03 741 is a remotely controlled 45 task is adapted For example, milling heads with kräf drilling turret for machine tools previously known term storage and rigid tool holder for this All tool carriers must always be fitted with cutter heads. Or facing heads, with the spindle being moved away. Facing head, facing slide drive and distance measurement are also housed in this head that is not required, i.e. it is at rest. But even single spindle tool carriers (drill heads) must have the same spindle heads for automatic change of single work-

chen tool carrier (op) g p

Accuracy are maintained as for the respective in tools can be achieved with an inventive method

tool carrier located in the position, because all use direction.

Tool carrier turret-shaped on a carrier. The tool carrier can automatically be inside

are fixed, so that the entire storage very precisely a machining cycle or semi-automatic or

must be carried out. The number of tool trays 55 manually when retooling, depending on the requirements

ger (number of heads) is determined by the turret body and can be exchanged. There is no system limitation

and restricted All tool carriers must always be limited to a certain number of tool carriers

be moved. Maintenance is problematic; given. The exchange system is independent of the

the storage problem is not easy to solve either. The size of the tool carriers and their number per se

Tool carriers are not open or unlimited with other tools. These are important in all cases

load when the turret rotates The short access times and short chip-to-chip

means that such tool carriers (drill heads) also have times.

not maintained and / or with other tools. Another advantage is the good accessibility for

can be pieces that are not in the working position, the tool change and good accessibility

are located. 65 for maintenance.

The same applies analogously to the object of Since there is always only one tool carrier in the work position

DE-OS 29 34 395. Even with this construction, development needs to be located, need energy and me-

all tool carriers are always swiveled, service feed only once for the working position

5 6

sensitive tool carrier to be provided. Another tool carrier 9 is in work

Overall, a device position according to the invention can be achieved on a drive unit 10, which in the case of the

Build very compact device, with a direct current drive easily possible

borrowed, the device is also assigned to processing in the X- 11.

and set up in the V-axis. In addition, 5 tool carriers 9 and drive unit 10 are at the same time as a device according to the invention. Deep drilling propulsion current drive 11 together form a group that is possible overall for advice, facing operations and testing processes.
Huh With chain-dotted lines are from the

In contrast to the prior art, FIG. 1 to 3 apparent embodiment tools

Change system no high accuracy requirements are indicated and denoted by 12, 13 and 14

gen because only a certain, in working position can z. B. be a drill or milling cutter. It can be a

Any number of such tools provided by the drive unit located tool carrier

is recorded and coupled. Therefore are needed so that the tool carriers 7, 8, 9 and 50 more

only in this position the required accuracy. B. multi-spindle drill heads represent

to be provided, but not for the tool trays. The drawing also shows that

ger who are in the storage position, z. B. around the to the tool carrier 7,8,9,50 block-shaped and as an ins-

drive unit. all interchangeable units are designed,

The fact that the interchangeable ring is the drive unit in all illustrated embodiments in encloses ring-shaped, the device builds an extravagantly rectangular shape from the top view compact. Due to the special nature of the hub 20 ways, but also z. B. square, cube-shaped or in and the sliding movements that occur when changing from any other suitable manner, e.g. B. polygonal, tool carriers can be with a preform according to the invention.

direction are carried out, result in extra- Below the drive unit 10 and the tool

Very short non-productive times, so that a device carrier 7, 8, 9 and 50 is an interchangeable ring 15 with a vertical

device according to the invention in the large-scale production 25 arranged axis of rotation 16 The interchangeable ring 15 has at

with particular advantage, for example in the automobile from FIGS. 1 to 3 apparent embodiment

bilindustrie, can be used in one piece connected to it, vertically upwards

Claims 2 to 6 describe advantageous protruding, extending parallel to the axis of rotation 16

Embodiments of the invention. kende holder 17, 18, 19 and 20, which are at

In the drawing, the invention - partly schematic - of this embodiment in plan view is an approximate

table - illustrated by exemplary embodiments It have a triangular design and extend approximately up to

shows to the upper edge of the drive unit 10 extend. the

F i g. 1 a flexible processing unit in the side receiving holder 17 to 20 each have ninety

looks at; Staggered degrees to each other, pointing outwards

F i g. 2 is a plan view of FIG. 1; 35 levels on several female couplings, one of which

3 shows a view in the direction of arrow F in only the couplings 21 to 31 with reference numerals

F i g. 1; are provided. The F i g. 1 and 3 recognize

4 to 26 further embodiments of the invention that on each receiving holder 17 to 19 several

manure. Couplings - in this case in pairs - in different

In the embodiment according to FIGS. 1 to 3 is 40 borrowed height areas are arranged,
with the reference numeral 1 one in the illustrated embodiment This female couplings 21 to 3! Corresponding guide, horizontally arranged slide guides with suitable abutments, which are identified on the tool on which a slide carrier 7, 8, 9 and 50 are provided in the direction D or E. The slide guide bearings 1 and slide 2 form a slide unit 62 is 45 in FIG. 1 for the sake of clarity. 1 only the abutment 32 is provided with a reference number a relative to the carriage 2 in its longitudinal direction. The remaining abutments of the tool carriers are relatively movable auxiliary slides. can be designed accordingly so that they

The reference number 3 denotes one of the female couplings 2t to 31 assigned to it in FIG

Provided embodiment of a stationary substructure on which can be engaged and disengaged,

the slide guide 1 is arranged 50 from FIG. 3 also shows that the drive

With the reference numerals 4, 5 and 6, three tool units 10 are provided with a central energy supply 33; As the F i g. 2 shows the one tool carrier, in the present case the tool carrier S and the tool carrier tray 5 in one end region of the tools 14 thereof, arranged with drive energy to supply slide guide 1, while there are each 55 gene. Furthermore, the drive unit 10 has on-tool carrier tray 4 and 6 on diametrically opposed take-up and clamping elements 34, 35, 36 and 37 for the opposite sides of the slide guide 1, and tool carriers, over which the respectively in Arzwar outside of the vertical projection of the Schiit- Tool carriers located at the ready position, in the present case 9, at least 2, but in the immediate vicinity of the same, is fastened, clamped and drivable
the. 60 With the reference numeral 38 is a motorized connection

In the embodiment shown in FIGS. 1 to 3 for the interchangeable ring 15, the motorized form is designated is on the tool carrier tray 5 and see drive 38 drives a not illustrated in detail Tool carrier tray 6 each has a tool carrier 7 th pinion, which is connected to an interchangeable ring 15 or 8 arranged while the tool carrier tray integrally connected toothed ring 39 meshes in such a way 4 in this embodiment (FIG. 2) on the assumption that the interchangeable ring 15 unmenen in both directions of rotation In the example case, no tool carrier can be driven at last. The interchangeable ring 15 is on Here, however, a tool carrier 50 can also be arranged vertically in the illustrated embodiment be. Kale axes of rotation having roles out of which

from Fig. 1 the rollers 40 and 41 can be seen. Over the circumference of the interchangeable ring 15 can be several such Rolls to be arranged to each other.

The reference numeral 42 denotes in FIG. 1 an angle lever, one lever arm of which via an axis 43 is pivotably mounted on the slide 2 in the vertical plane. With the angle lever 42 is a coupling rod 44 via an axis 45, also coupled to pivot in the vertical plane. The coupling rod 44 is connected at its end facing away from the angle lever 42 via a pivot axis 46 to a coupling 47, which is assigned to the auxiliary slide 62.

In the case of the FIGS. 1 to 3 shown embodiment is only one on one side of the device those of an angle lever 42, coupling rod 44, pivot axis 46 and a coupling 47 besiehende arrangement intended. Nothing stands in the way of a corresponding arrangement on the other side of the device hold true.

With 49 is arranged at the end of the angle lever 42, Above the carriage 2 outstanding roller designated 48 and 48a are inclined at 45 degrees rising Guide grooves on both sides of the auxiliary slide

62 are arranged and engage in the cam rollers arranged on each side of the device on the carriage 2, of which only the cam rollers 60, 61 can be seen from FIG. 1. At 63 one is curved downwards running control curve with extended inlet referred to, in which the roller 49 is able to run.

The angle lever 42, together with the control cam 63 and the guide grooves 48, 48a, enables recording or moving the tool carriers apart to drive unit 10 or placing them on the Storage stations for the tool carrier with the help of the change ring 15. When the roller 49 in the control cam

63 enters, it is pivoted downwards when it reaches the downwardly curved part of the curve, whereby the auxiliary slide 62 via the angle lever 42, the coupling rod 44 opposite to the direction of movement

E, that is, relative to the carriage 2, is displaced. A horizontal movement of the interchangeable ring 15 initially takes place via the horizontal curve sections, while the interchangeable ring 15 is moved in direction A when the inclined curve part of the guide grooves 48, 48a is reached. The arrangement is such that when entering the inclined part of the curve, which extends at 45 degrees in the embodiment shown, the interchangeable ring 15 stands still with respect to the storage stations for the tool carriers

The mode of action of the FIGS. 1 to 3 apparent embodiment is the following:

To the efficiency of the fig.! to 3 To make the apparent device particularly clear, it is assumed that also on the tool carrier tray 4 a tool carrier rests, which is shown with dash-dotted lines and with the reference number 50 was designated.

The starting point for the machining sequence is the illustration according to FIG. 1, in which the tool carrier is in a processing position

The following sequence of operations results for changing the tool carrier 9:

the drive unit 10 and the interchangeable ring 15 are retracted.

3. Before reaching the end position, the tool carrier 9 is automatically decoupled from the drive unit 10 and taken over by two of the receiving holders 17 to 20 of the interchangeable ring 15. When the slide 2 is moved in the direction E , the roller 49 enters the control cam 63, whereby the angle lever 42 is pivoted downward in the direction C. This results in a corresponding displacement of the coupling rod 44 in the D direction and thus a corresponding displacement of the auxiliary slide 62 in the D direction. Since the auxiliary slide 62 is coupled to the interchangeable ring 15, the movements are coordinated with one another in such a way that the interchangeable ring 15 remains stationary relative to the movement of the carriage 2. Then the interchangeable ring 15 is raised in direction A , the interchangeable ring 15 during its stroke A picks up the tool carriers 7, 8 and 50 located in the storage position on the tool carrier trays 4 to 6 via its receptacle couplings 21 to 31 and also lifts it so that the tool carriers 7 , 8.50 come free from their tool carrier trays 4, 5.6.

4. Then the interchangeable ring 15 including the tool carriers 7, 8, 9 and 50 to z. B. 90 degrees rotated by motor

5. Subsequently, the carriage 2 in the direction D is moved by motor, wherein the change ring 15 during this movement in the direction D of the carriage 2 a downward stroke, ie in the direction rdurchführt wherein z. B. the tool carriers 7, 8, 9 are placed on the tool carrier trays 4, 5 and 6, while the tool carrier 50 is lowered for picking up. With a further forward movement of the carriage 2 with the interchangeable ring 15 in the direction D , the tool carrier 50 is taken over by the drive unit 10, ie fixed, clamped and coupled. The tool carrier 50 is then in the working position.

1. The tool carriers 7, 8 and 50 are in their storage positions on the tool carriers shelves 4,5 or 6.

2. Slide 2 and auxiliary slide 62 are motorized in direction F (Fig. 1) with the tool carrier 9, In the embodiments according to FIGS. 4 to 12, the same reference numerals are used for parts with the same function as used in the embodiment described above.

The embodiment according to FIGS. 4 to 6 differs from the embodiment according to FIG. 1 essentially in that the device also allows machining in the y-axis. For this purpose, the drive unit 10 is assigned a vertical guide. in direction D relative to the interchangeable ring 15 is advanced by 100mm, for example. Then the tool carriers 6 and 50 are placed on their tool carrier trays 4, 5 and 6, while the tool carrier 9 is taken over by the drive unit 10, ie fixed, clamped and coupled.

In FIG. 6, the machining position is illustrated in which the machining unit, consisting of slide 2, interchangeable ring 15, drive unit 10, drive and tool carrier 9, has been moved further forward in direction D.

Both the embodiment according to FIGS as well as the embodiments according to FIGS. 4 to 6 can be provided by external memories in the area of the

tion can be expanded.

On the embodiments according to FIGS. 7 to 12 So-called head magazines are provided in which further tool carriers are provided. For example shows the embodiment according to FIG. 7 the expansion of the magazine, in which for an additional Tool carrier two additional magazine spaces are required, one on the left and one on the right.

The individual machining heads (tool carriers) are shown in FIG. 7 denoted by the reference symbols K 1 to K 6

In the embodiment according to FIG. 10 are two devices according to FIG. 3 have been chained together. The tool carriers were again designated with K 1 to K 7

The embodiment according to FIG. 8 again shows a variant with an external memory in the area of the device, the tool carriers again being designated with the reference symbols K 1 to K 8.

From Fig. An embodiment can be seen in FIG of magazines 56 and 57 can be seen, with one empty space in magazine 56 and several empty spaces in magazine 57 were illustrated.

In the embodiment according to FIG. 11, a device according to the invention is assigned a magazine 58 in which several tool carriers K 3 to K 9 are kept ready, while tool carriers Ki and K 2 are located on the device, which has only one working position and one storage position, while the embodiment according to FIG. 12 is a tool carrier magazine 59 shows tool carriers KX to K 8

In the embodiment according to FIGS. 13 to 15, the same reference numerals have again been used for parts with the same function. In this embodiment, a flexible multi-spindle machining unit with machining in the Z axis is illustrated, while FIGS. 16 to 18 illustrate an embodiment in which machining in the Y and Z axes is possible

The Fi g. 19 to 21, on the other hand, show an embodiment in which machining in three axes, that is to say the X, Y and Z axes, is possible while FIGS. 22 to 24 illustrate an embodiment in which machining is given in the X and Z axes

In Fig. 25 the interchangeable ring t5 is in the raised position, namely in the pivoted position, while Figure 26 shows the processing position when lowered Interchangeable ring 15 shows, in which the front tool carrier is fixed coupled to the drive unit 10 and is excited

Those described in the description and in the claims and those that emerge from the drawing Features can be used both individually and in any combination for the realization of the Invention be essential.

List of reference symbols

Slide guide

sleds

Substructure

Tool holder tray

Tool holder tray

6 Tool holder tray

7 tool carriers

8 tool carriers

9 tool carriers

10 11 12 13

5 14 15 16 17 18

10 19 20 21 22 23

15 24 25 26 27 28

20 29 30 31 32 33

25 34

35 36 37 38

30 39 40 41 42 43

35 44

45 46 47 48

40 48a 49 50 51 56

45 57

58 59 60 61

50 62 63 64 AD

55 E.

T X Y Z

Drive unit DC drive tools

Tools

Tools

Interchangeable ring axis of rotation

Receptacle holder Receptacle holder Receptacle holder Receptacle coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Pick-up coupling Abutment

Energy supply, mounting and clamping elements, mounting and clamping elements Retaining and clamping elements Retaining and clamping elements Swivel drive gear rim

role

role

Angle lever axis

Coupling rod axle

Swivel axis coupling

Guide groove Guide groove role

Tool carrier vertical guide magazine

magazine

magazine

magazine

roll

roll

Auxiliary slide control cam media supply Kubbcwcgüiig Stroke direction Stroke direction Stroke direction Movement direction Movement direction Movement direction

15 sheets of drawings

Claims (6)

Patent claims: 1. Device for changing a tool holder on a machining unit for machining of workpieces in which the entire tool carrier can be removed from a machining position and is interchangeable with a different tool carrier in such a way that when in the working position located tool carrier another tool carrier or several other tool carriers on the circumference of a circular arc in the area of a drive unit and / or in at least one magazine are to be kept ready and in the working position on the only one drive unit for all tool carriers located tool carrier by at least one linear movement, a rotary and a lifting movement to a cancellation by means of a ring-shaped changing device up to the tool carrier (s) kept ready or tool carriers is or are movable, the tool carrier previously in the working position can be disconnected from the work unit in terms of gear and body and can be stopped in this position is and after uncoupling the tool carrier and during the further movement of the drive unit or then the uncoupled tool carrier or the tool carrier or carriers kept ready execute the stroke relative to the drive unit and after completion of the stroke movement all Tool carrier moved by the lifting movement with the same, in particular vertical axis of rotation are rotatable, such that a predetermined tool carrier in a receiving position in front of the drive unit can be brought and after the end of the rotary movement of the tool carrier with the opposite Hub brings the tool carrier into a storage position and the drive unit in the opposite position Movable direction of movement on the tool carrier held ready in the receiving position and can be coupled, fixed and tensioned to this when moving further, characterized in that that the tool carriers (7,8,9,50) for exchanging the working in a standby or in the magazine position ring-shaped tool changing device as a change ring (15) is designed with tool carrier receptacles, which encloses the drive unit in a longitudinally displaceable manner, the interchangeable ring (15) together with the drive unit (10) with a slide (2) on a slide guide is arranged movably together, and the change ring (15) receiving couplings (21 to 31) for coupling and uncoupling the tool carrier (7, 8,9,50). 2. Device according to claim 1, characterized in that that the tool carriers (7, 8, 9, 50) only by weight in the coupling couplings in the Tool holder mounts on the change ring (15) can be held. 3. Apparatus according to claim 1 or 2, characterized in that the tool carrier (7,8,9,50) from the interchangeable ring (15) in two or more directions of movement perpendicular to one another are recordable. 4. Apparatus according to claim 1 or one of the following, characterized in that the receiving and clamping elements (31 to 34) both for receiving in the interchangeable ring (15) and in a magazine to serve. 5. Apparatus according to claim 1 or one of the following, characterized in that below the interchangeable ring (15) at least one angle lever (42) with at least one roller <49) is arranged, the angle lever (42) having a coupling rod (44) one of the slide (2) assigned to the longitudinally displaceable auxiliary slide (62) is connected, and that the roller (49) enters a control cam (63) in an end position, such that in a predetermined end position of the auxiliary slide (62) the The change ring (15) relative to the displacement movement of the slide (2) by the opposite movement of the auxiliary slide (62) can locally stand still and that the change ring (15) through appropriately arranged groove-like curves (48,48a ^ in the auxiliary slide (62) or the like with locally attached guide elements ^ e.g. rollers (60, 61) a lifting movement (A, T) is given in two opposite directions, with two or more groove-like curves (48, 4Sa) over a part l their length, in particular under 45 degrees, are arranged parallel to one another. 6. Apparatus according to claim 1 or one of the following, characterized in that the drive unit (10) is assigned a vertical guide as a V-axis (51) The invention relates to a device for changing a tool holder on a machining unit for processing workpieces in which the entire tool carrier from one processing position is removable and interchangeable with a different tool carrier, such that when in the working position located tool carrier on another tool carrier or several other tool carriers the circumference of a circular arc in the area of a drive unit and / or in at least one magazine must be kept ready and the one in the working position on the only one drive unit for all tool carriers Tool carrier by at least one linear movement, one rotary movement and one lifting movement a storage position by means of a ring-shaped changing device up to the one or those kept ready Tool carrier or tool carriers is or are movable, the previously in the working position Previously tool carriers from the work unit can be disconnected in terms of gear and body and in this position can be stopped and after uncoupling the tool carrier and during the further movement of the drive unit or then the uncoupled tool carrier or the tool carrier or carriers kept ready execute the stroke relative to the drive unit and after completion of the stroke movement all The tool carrier moved by the lifting movement can be rotated with the same, in particular vertical, axis of rotation are, such that a predetermined tool carrier in a receiving position in front of the drive unit can be brought and after the end of the rotary movement of the tool carrier with the opposite stroke Brings the tool carrier into a storage position and the drive unit in the opposite direction of movement movable on the tool carrier held ready in the receiving position and on when moving further this can be coupled, fixed and tensioned.